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uma: record allocation failures due to zone limits

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The zone limit mechanism was recently reworked, and
allocation failures due to limits being exceeded
were inadvertently no longer being recorded. This
would lead to, for example, mbuf allocation failures
not being indicated in netstat -m or vmstat -z

Reviewed by:	markj
Sponsored by:	Netflix
This commit is contained in:
Andrew Gallatin 2020-08-21 18:31:57 +00:00
parent 71230912a7
commit 791dda877f
1 changed files with 3 additions and 1 deletions
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4
sys/vm/uma_core.c
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@ -3952,8 +3952,10 @@ zone_alloc_item(uma_zone_t zone, void *udata, int domain, int flags)
{
void *item;
if (zone->uz_max_items > 0 && zone_alloc_limit(zone, 1, flags) == 0)
if (zone->uz_max_items > 0 && zone_alloc_limit(zone, 1, flags) == 0) {
counter_u64_add(zone->uz_fails, 1);
return (NULL);
}
/* Avoid allocs targeting empty domains. */
if (domain != UMA_ANYDOMAIN && VM_DOMAIN_EMPTY(domain))